Mechanism for delivering wire from a coil thereof



June 16, 1964 wm s 3,137,452

MECHANISM FOR DELIVERING WIRE FROM A COIL THEREOF Filed Sept. 14, 1961 4Sheets-Sheet 1 116-.1. v I d L 51 32 a ders June 16, 1964 R. F. WINDERS3,137,452

MECHANISM FOR DELIVERING WIRE FROM A com THEREOF Filed Sept. 14, 1961 4Sheets-Sheet 2 IN VENTOR 1701102"! I Winds-r TTORNEY June 16, 1964 R. F.WINDERS 3,137,452

MECHANISM FOR DELIVERING WIRE FROM A COIL THEREOF Filed Sept. 14, 1961 4Sheets-Sheet 3 EOF June 16, 1 R. F. WINDERS MECHANISM FOR DELIVERINGWIRE FROM ACOIL THEIR 4 Sheets-Sheet 4 Filed Sept. 14, 1961 uziosz@2210; ME;

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United States Patent 3,137,452 MECHANISM FOR DELIVERING WIRE FROM A COILTHEREOF Robert F. Winders, 4300 District Blvd, Los Angeles 58, Calif.Filed Sept. 14, 1961, Ser. No. 138,094 Claims. (Cl. 242--54) Thisinvention relates to a mechanism for feeding wire from a coil thereof toa vw're forming machine.

An object of the invention is to provide a powered mechanism wherebywire may be fed from a rotating coil thereof and delivered to a wireforming machine wherein the speed of rotation of the coil and the feedof the wire therefrom will be automatically varied according to thedemands of the wire forming machine and wherein rotation of the coil andfeed of the wire therefrom will be automatically terminated in event ofstopping of the wire forming machine, or in event of tangling of thewire being fed from the coil.

Another object is to provide a wire feeding mechanism of the abovecharacter which is especially advantageous for use in the delivery ofwire from coils thereof wherein the initial weight of the coil is, forexample, in the neighborhood of two thousand pounds, thus necessitatingthe effective application of forces in overcoming inertia in initiatingmovement of the coil and in overcoming momentum in arresting movementthereof.

With the foregoing object and advantage in view, together with suchother objects and advantages as may subsequently appear, the inventionresides in the parts and in the combination, construction andarrangement of parts hereinafter described and claimed and illustratedby way of example in the accompanying drawings in which:

FIG. 1 is a diagram in plan depicting the mechanism as applied and inoperation in effecting the feed of wire from a coil thereof to a wireforming machine;

FIG. 2 is a diagram in plan depicting in dotted lines the wire feedingmechanism with parts as disposed to automatically stop operation of thewire feeding mechanism;

FIG. 3 is an enlarged detail in section and elevation as seen on theline 33 of FIG. 2 in thedirection indicated by the arrows;

FIG. 4 is a detail in section and elevation taken on the line 44 of FIG.2 as seen in the direction indicated by the arrows;

FIG. 5 is a schematic diagram of the brake and clutch elements of thewire feeding mechanism with their as sociated controls embodied in awire forming machine;

FIG. 6 is an enlarged View of the portion of FIG. 1 indicated by thebracket 6;

FIG. 7 is a diagram in plan depicting a modification of the inventionwith portions removed; and

FIG. 8 is a detail in elevation of the wire supporting arm as seen onthe line 88 of FIG. 1 in the direction indicated by the arrows.

I Referringto the, drawings more specifically A indicates a rotary tablefor supporting a coil B of wire C which coil is seated on the table andcentered axially thereof by a multiple of. equispaced circularlyarranged posts 10 nfiounted on the table A andabuttingthe innerperiphery of t e coil.

The upper end portions of the posts 10 project a substantial distanceabove the upper face of the coil B to serve as guides to aid indirecting the wire C into an enlarged convolution or loop C as itseparates from the coil B and preliminary to its delivery to a wireforming machine D, the purpose of which will later appear. The table Ais mounted on the upper end of an upstanding shaft, 11

revolubly supported by bearings 1212' on a fixed standard 13.

3,137,452 Patented June 16, 1964 Aflixed to the under side of the tableA is an annular rail 14 arranged contiguous the perimeter of the table Aconcentric with the axis of the shaft 11. The rail 14 has its outerperiphery engaged by a continuous flexible driving element 15, such as asprocket chain, belt or cable, which passes around and is engaged by adriving wheel or pulley 16 on the upper end of an upstanding revolubleshaft 17. The shaft 17 is seated at its lower end on an end thrustbearing 18 and has its upper end portion revolubly guided in a bracket19 projecting horizontally from an upstanding wall 20.

Loose on the shaft 17 is a pulley 21 engaged by a belt 22 which passesaround and is engaged by a variable speed pulley 23 on the drive shaft24 of an electric motor 25 mounted for horizontal swinging movementtoward and away from the shaft 17. The motor 25 is here shown as rigidlymounted on an upright panel 26 erected at its lower end on a bracket 27mounted to swing horizontally on a pivot 28. Projecting from the panel26 and extending alongside the motor 25 is a plate 29 to which isconnected the outer end of a pull spring 30 acting on the plate 29 andpanel 26 to normally swing the motor 25 away from the shaft 17 to aretracted position wherein the variable speed pulley 23 is in its lowspeed driving condition.

Erected adjacent the plate 29 on the side thereof opposite the motor 25,is a vertically extending rock-shaft 31 on the upper end portion ofwhich is fixed a long horizontal arm 32 the outer end portion of whichextends contiguous the coil B on a plane slightly thereabove. The arm 32functions as a directional support for wire C delivered from the coil B,as will be later described, and also serves as an actuator for turningthe rock-shaft 31 in one direction under a pull imposed on the outer endof the arm 32 by the wire C supported thereon.

Means are provided whereby turning of the rock-shaft 31, under a pullimposed on the arm 32, will elfect swinging movement of the motorcarrying panel 26 in opposi tion to the pull spring 30, which meanscomprises an arm 33 fixed on the shaft 31 having a roller 34 on itsouter end seated against the outer face of the plate 29 so that inwardmovement of the arm 32 will be transmitted through the rock-shaft 31,arm 33, roller 34 and plate 29 to the panel 26. A pull spring 35 has oneend thereof attached to the wall 20 and has its other end connected to abracket 36 fixed on the rock-shaft 31, which spring acts through therock-shaft 31 to normally maintain the arms 32 and 33 in their retractedposition and to yieldably oppose advance movement of the arm 32 underthe pull of the wire C, as will be later described.

Mounted on the outer end portion .of the arm 32 are two pair ofdirection rollers a-b and c-d around which the wire C is rove; the wireC leading from the coil B being passed successively around the directionrollers a-b on the arm 32 and then looped around the upstanding endportions of the posts 10 and then passed around the direction rollers cand d. The wire C leads from the roller d to the intake feed rollers 38of the wire forming machine D as indicated in FIG. 1'.

Fixed on the shaft 17 adjacent the pulley 21 is a 'brake drum 37 andinterposed between the pulley and brake drum are the members e-f of afriction clutch E of which the member e is aflixed to the upper side ofthe pulley 21 while the clutch member f is afiixed to the under side ofthe brake drum 37. The members e f of the clutch E are normally disposedin interengagement by a spring 38 encircling the shaft 17 and extertingan upward thrust against the underside 'of the pulley 21. As'here shown,the spring 38 seats atits lower end on, a ball bearing 39 abutting abearing 40 supporting the shaft 17, and which spring bears indirectly atits upper end on a ball bearing 41 on which seats the underside of thepulley 21.

Interposed between the spring 33 and the bearing 41 is a yoke 42constituting the lower end of an upstanding bellcrank lever F pivoted at43 and adapted to be rocked to depress the spring 38 to therebydisengage the clutch E or to release the depressed spring to effectengagement of the clutch.

A brake shoe G is provided for engagement with the drum 37 to stoprotation of the shaft 17 and the table A driven therefrom. As hereshown, the brake shoe G is fixed on a piston rod 44 fitted with a piston45'arranged in a cylinder 46. The upper end 47 of the bell-crank Fextends astride the piston rod 44 between the shoe G and a collar 48 onthe piston rod 44 and normally acts under the thrust of the clutchspring 38 to retract the piston 45 and thereby dispose the brake shoe Gout of engagement with the drum 37.

The brake shoe G is applied by directing fluid under pressure into thecylinder 46 behind the piston 45 under control of a valve H, the brakebeing designed to be applied simultaneously with release of the clutchE. The cylinder 46 is fitted with a fluid supply conduit 49 leading fromthe discharge side of the valve H which is here shown as embodying ahousing 56 having an outlet port g with which the conduit 49 connectsand having an intake port It with which connects a supply pipe 51leading from any suitable source of fluid under pressure. The valvehousing 59 is fitted with a valve cylinder 52 having a passage j adaptedto be disposed in and out of communication with the ports g and h onturning the valve to its on and off positions. The valve H has anexhaust port k and the valve cylinder 52 is provided with a passage kadapted to be positioned to open the port k to the discharge port gwhereby the cylinder 46 is opened to atmosphere and thus normallyexhausted of fluid presusre and whereby the clutch E is normally engagedand the brake G normally released. The valve H is provided with anoperating lever 53 acted on by a spring 54 normally positioning thevalve cylinder 52 with the passage j closed to the ports g and h andwith the exhaust port k opening the discharge port g to atmosphere asparticularly shown in FIG. 5.

The wire forming machine D with which the wire feeding mechanism abovedescribed is associated, embodies a. normally engaged clutch Jconnecting a power driven pulley 57 with a driven shaft 58 actuating thewire forming mechanism in the machine D in a usual manner; the pulley 57being driven by a belt 59 from a source of power (not shown). The clutchJ is locked in its engaged position by a toggle lever 60 and is adaptedto be released in the usual manner by the operation of a slide bar 67attached to the toggle lever 69 by a lost motion connection K here shownas comprising a pin 69 on the toggle lever 60 engaged in an elongatedslot 70 in the inner end portion of the slide bar 67 as particularlyshown in FIG. 5.

The slide bar 67 is mounted for longitudinal movement on the housing 71of the wire forming machine D and is advanced to its forwardmostposition against the thrust of a spring 72 so as to advance the togglelever 60 and thereby engage the clutch I and thus place the wire formingmachine D in operation; the slide bar 67 being manually advanced throughthe medium of a hand hold 73 on the outer end thereof.

A spring urged pawl 74 is arranged to then engage a collar 75 fixed onthe slide bar 67 to retain the latter in its forward position so thatthe clutch I will then be disposed in its engaged position. When theslide bar 67 is in its forward position the outer end of the slot 7dwill be spaced from the pin 69 on the lever 63 to afford a lost motionclearance whereby initial outward movement of the slide bar 67occasioned on release of the pawl 74- from the collar 75, will occur fora short distance before operatively disengaging the clutch lever 63, thepurpose of which will appear hereinafter.

Means are provided for automatically disengaging the pawl 74 from theslide bar 67 which means embodies a normally open microswitch Lcontrolling a solenoid mag- 29 and is adjusted thereon so that when thepanel 26 is swung under the urge of the arm 32 when advanced to itsforwardmost position, the stem will engage the switch arm 0 and closethe switch L. The switch L normally remains open at all times exceptwhen closed as above stated and which occurs only when the arm 32 ismoved to its extreme forward position.

The contact I on the switch arm 0 connects with an" electrical conductors leading to one terminal of the solenoid M the other terminal of whichconnects with a I conductor t which with a conductor a connecting withthe contact m on the'switch arm p leads to an outlet N of a source ofelectrical current supply in a usual manner.

Means are provided for automatically actuating the fluid pressurecontrol valve H which means is controlled 7 by actuation of the slidebar 67 in placing the wire formopen microswitch Q adapted to be closedby movement' of the slide bar 67 under the urge of the spring 72. Theswitch Q embodies a pair of contacts v-w on a pair of normally retractedswitch arms xy of which the switch arm x extends in front of aprojection 77 on thetslide bar so that as the slide bar is retractedfrom its advanced clutch releasing position, the switch Q will be closedthereby. A conductor u leads from the conductor u to the switch contactw and a conductor z leads from the contact x to one terminal of thesolenoid P the other terminal of which connects with the conductor 1through a conductor t.

In the arrangement shown in FIG. 7, the valve H is controlled directlyby movement of the slide bar 67, the projection 77 on the latter beingdisposed to engage the valve operating lever 53 to open the valve forthe passage of fluid under pressure therethrough on retraction oftheslide bar.

When the wire forming machine D is out of operation with the slide bar67 retracted and switch Q closed, as shown in dotted lines in FIG. 1,the solenoid P will be energized and the valve I-I thereby held open soas to deliver fluid pressure into the cylinder 46 whereby the bellcranklever F will be actuated so as to engagethe brake G and release theclutch E. Theparts of the wire feeding mechanism will then be brought torest except as to. the motor 25 and the variable speed pulley 23, belt22, and pulley 21 driven thereby.

In the operation of the invention, on the wire C being rove from thecoil B around the direct-ion rollers L l-b,

posts 10 and direction roller c-d, in the order named, and

the leading end of the Wire engaged by the intake feed rollers 38 of thewire forming machine D, the machine D is set in operation by engagingthe. clutch J, which is eflected by advancing the slide bar 67 from itsinitial retracted position indicated in dotted lines in FIGS. 1 and 5 tothe advanced position shown in full lines in which positionthe slide barspreads the toggle lever 60 so as to lock the clutch I in its engagedand driving position. The slide bar is then engaged by the pawl 74 andretained thereby in its ad vanced position in opposition to the spring72. Forward taneously releasing the brake G and engaging the clutch ElCoincident with initiating operation of the wire forming machine D, orshortly previous thereto, electrical current is directed from a suitablesource of supply to the motor 25 as by closing a control switch in ausual manner, whereupon the motor 25 will act to drive the pulley 23,belt 22 and pulley 21 so as to rotate the shaft 17 through the thenengaged clutch E. Rotation of the shaft 17 acts through the sprocket orpulley 16 and element 1 15 to drive the rotary table A and therebyrotate the coil B and efiect unwinding of the wire C therefrom.

A considerable length of the wire extends between the coil B and thewire intake rollers 38 of the wire forming machine D, which length inpassing around the direction rollers a-b on the arm 32 followed by aloop thereof passing around the posts and then leading to the machine Daround the rollers c-d assumes a large spiral configuration by reason ofthe inherent stiffness or resistance to bending pressure of the wire.Because of flexibility of the considerable length of the wire as awhole, such spiral arrangement is subject to fluctuation; the spiralformation permitting variation in the recited length of the wire as willbe occasioned during operation by reason of the delivery of the Wirefrom the coil C being continuous while the intake into the wire formingmachine is intermittent due to the frequent stopping of the wiredelivered to the machine when severing the wire into formed lengths.

The wire C delivered from the coil B passes to the wire forming machineat a speed dependent upon the rate of consumption of the wire by themachine D which may vary between a minimum and a maximum. Such variationis reflected by variation in the pull of the wire imposed on the arm 32by the wire intake mechanism 38 and resisted by the spring 35 andwhereby the arm 32 will be caused to rapidly assume various positionswithin the range of its path of travel, which in normal operation willbe confined to the outermost portion of such movement. When the pull onthe arm 32 is at its minimum the arm 32 will be retracted by the spring35 to near its outermost position so that the variable speed pulley 23will then be positioned to drive the belt 22 and the rotary table A atslow speed, but on increase of such pull, the arm 32 will be advancedinwardly so as to dispose the variable speed pulley 23 in a positionsuch as to drive the belt 22 and rotary table at a higher speed. Itfollows that while the motor 25 operates at a uniform speed of rotation,the rotary table and the wire coil thereon will vary in their speed ofrotation according to the position of the arm 32 in its arc of travel.

In event, for any cause, the recited pull on the arm 32 be excessive, asby entanglement of the Wire C in the coil B the arm 32 will beautomatically pulled fully inward by tension imposed on the wire by thefeed 38 thereby causing the motor carrying panel 26 to swing under thepressure of the arm 33 thereby closing the switch L and energizing thesolenoid M to thereby release the pawl 74 from engagement with the slidebar 67 so that the spring 72 will act to advance the slide bar to itsoff position thus disengaging the clutch J and stopping the machine D.Initial movement of the slide bar 67 will close the switch Q to therebyenergize the solenoid P and actuate the valve H to thereby disengage theclutch E and simultaneously apply the brake G thus terminating movementof the rotary table A and stopping feed of the wire C from. the coil B.

When it is desired to terminate the operation of the wire formingmachine D and the wire feeding mechanism, the pawl 74 is released by theoperator and the slide bar allowed to move to its fully retractedposition under the urge of the spring 72 so as to disengage the clutch Jof the wire forming machine to stop the latter and also effect stoppingof the rotary table A by disengaging the clutch E and setting the brakeG.

The speed of rotation of the table A and the speed of rotation of theintake feed rollers 38 are so related to each other that the rollers 38will intermittently feed into the wire forming machine in a given perioda length of the wire C delivered by the rotating reel B on the tableover such period. Such relative speeds are primarily determinedbyregulation of the respective motors by which the wire working machineand the wire feed mechanism are operated.

During the operation of the wire delivering mechanism the speed oftravel of the wire C leading from the coil B will vary relative to thespeed of rotation of the table A by reason of variation in the radius ofthe coil at the point of departure of the wire from the coil, occasionedby the wire feeding from the coil at various points between the innerand outer perimeters thereof. This speed variation together withthatoccasioned by continuous delivery of the wire from the coil andintermittent feed of the wire to the wire forming machine is compensatedfor by the variable speed transmission afforded by the variable speedpulley 23 controlled by the pivoted wire supporting arm 32 as it isactuated to move forward on a pull being imparted thereto by the wireintake mechanism or feed rollers 38 of the wire forming machine infeeding the wire to the latter, which action accelerates rotation of thetable and coil, and as the arm is actuated by the spring 35 to moverearward during the interval when the pull of the feed rollers 38 isrelaxed to thereby dispose the pulley 23 so as to then deceleraterotation of the table and coil. This alternate acceleration anddeceleration of speed of rotation of the table and reel occurs with afrequency dependent upon the length of time required to form a length ofwire deliveredto the wire forming machine on each operation, which insome instances is quite rapid. During such acceleration and decelerationthe loop C' will be alternately enlarged and diminished by the alternateelongation and shortening of the length of wire C,

extending between the coil B and the intake feed rollers 38 of the wireforming machine, the loop C' thus serving to compensate for suchvariations in wire lengths and obviating binding of the wire in itsprogress from the coil B to the wire forming machine.

While a specific embodiment of the invention has been shown anddescribed, the invention is not limited to the exact details ofconstruction set forth, and the invention embraces such changes,modifications and equivalents of the parts and their formation andarrangement as come within the purview of the appended claims.

I claim:

1. The combination with a wire forming machine having wire intakemechanism adapted to engage and exert a pull on a wire deliveredthereto, and embodying clutchoperating means controlling operationthereof, of a rotary table adjacent to but spaced from said wire formingmachine for supporting a coil of wire thereon, a pivoted wire supportingarm arranged to swing adjacent said table opposite and in spacedrelation to said intake mechanism, a plurality of direction rollers onsaid arm around which a length of wire leading from a coil thereof onsaid table is adapted to be rove with the leading end thereof directedfrom one of said rollers to said intake mechanism, an upstanding memberon said table projecting above a coil of wire thereon adapted to havepassed therearound the portion of wire leading over certain of saiddirection rollers for disposing said wire portion in a loop; a tensionedspring urging said arm outward in opposition to a pull exerted on thewire from said intake mechanism; means for rotating said table to unwindwire from the coil thereon embodying an upstanding rotary shaft, adriving connection between said rotary shaft and said rotary table, apulley loose on said rotary shaft adapted to be engaged therewith, abelt passing around and engaging said pulley, a variable speed pulleyengaged by said belt, a motor having a drive shaft on which saidvariable speed pulley is mounted, a pivoted panel on which said motor iscarried for horizontal swinging movement, spring means connected to saidpanel normally retaining the panel, motor and variable speed pulley in aretracted position wherein said pulley drives the belt thereon at slowspeed, means for swinging said panel in opposition to said spring underthe thrust of forward movement of said arm to thereby vary the action ofsaid variable speed pulley; means for stopping rotation oi said tableembod ing a brake drum fixed on said rotary shaft and a normally engagedclutch connecting said brake drum and the pulley on said rotary shaft,means for simultaneously actuating said clutch and brake to disengagethe clutch and apply the brake; and means operated by actuation of theclutch-operating means of the wire forming machine operatively connectedto said clutch and brake operating means to actuate the latter.

2. In a machine for delivering wire from a coil thereof to a wireforming machine, a rotary table for supporting and turning a coil ofwire to unwind wire therefrom, a motor, means for driving said tablefrom said motor ernbodying a variable speed pulley mounted on saidmotor, a belt engaging said pulley, a clutch driven by said beit, ashaft on which said clutch is mounted, and a driving connection betweensaid shaft and said table, a brake drum on said shaft embodied in saidclutch, a brake engageable with said drum, and means for simultaneouslydisengaging said clutch and applying said brake to stop rotation of saidshaft and table and also to alternately simultaneously engage saidclutch and release said brake, a pivotal mounting for said motor, andmeans for swinging said mounting to actuate said variable speed pulleyto vary the speed of rotation of said table.

3. In a machine for delivering wire from a coil thereof,

(a) a rotary reel supporting table,

(b) a revoluble shaft,

() a driving connection between said shaft and said table,

(d) a brake drum fixed on said shaft,

(e) a brake shoe engageable with said drum normally out of engagementtherewith,

(f) a pulley loose on said shaft, normally inter-engaged clutch membersinterposed between and interconnecting said brake drum and pulley,

(g) powered variable speed transmission mechanism drivingly connected tosaid pulley;

(h) a speed control arm,

(2') yieldable means normally maintaining said arm in a retractedposition,

(i) wire guides on said arm engaged by wire unwinding from a reel onsaid table whereby increasing tension on the wire will swing said arm toan advanced position in opposition to said yieldable means,

(k) means actuated by said arm adapted to condition said variable speedtransmission mechanism to drive said pulley and table at slow speed whensaid arm is in its retracted position and to drive said pulley and tableat increasing speeds as the arm moves toward its advanced positionwherein said pulley andtable are rotated at a maximum high speed; and

(1) means actuated by movement of said arm into its fully advancedposition to simultaneously disengage said clutch members and advancesaid brake shoe into engagement with said brake drum.

4. The structure called for in claim 3, in which said last named meanscomprises (a) a normally retracted fluid pressure actuated plungerconnected to said brake shoe,

(b) means actuated by said arm on moving to its advanced position fordelivering fluid pressure to advance said plunger andthereby engagesaidshoe with said brake drum, and

(0) means connected to said plunger adapted to disengage said clutchmemberson advance of the plunger.

5. T he combination with a wire forming machine having wire intakemechanism adapted to engage and exert a pull on a wire deliveredthereto, of a horizontal rotary table adjacent to but spaced from saidwire forming machine for supporting a coil of wire thereon, poweredmechanism connected to said table for rotating same to unwind wire froma coil thereon, a pivoted wire supporting arm arranged to swingadjacentsaid table near one side thereof and on a plane thereabove, said armbeing spaced from said winding machine opposite said wire intakemechanism, a plurality of direction rollers on said arm around which alength of Wire leading from a coil thereof on said table is adapted tobe rove with the leading end thereof directed from one of said rollersto said intake mechanism, a tensioned spring urging said arm outward inopposition to a pull exerted on the wire from said intake mechanism, avariable speed transmission in said powered mechanism, connectionsbetween said transmission and said arm controlling said poweredmechanism by swinging movement of said arm to vary the speed of rotationof said table from minimum to maximum according to various positions ofsaid arm as it is moved under the opposing pulls exerted thereon by thewire and a said spring; said arm and connections acting on said variablespeed transmission to accelerate rotation of said table on movement ofsaid arm under increasing pull imposed thereon by the wire, means forstopping rotation of said table controlled by movement of said arm underthe pull of the wire to an advanced position contiguous that where saidarm and connections condition said variable speed transmission to drivesaid table at a maximum high speed; said powered mechanism embodying ashaft, means for rotating said shaft, and means for driving said rotarytable from said shaft; and in which said table stopping means embodies anormally engaged clutch in said shaft rotating means, a brakecontrolling rotation of said shaft through said clutch, and valvecontrolled fluid pressure means controlled by said arm forsimultaneously dis engaging said clutch and applying said brake and alsoalternately engaging said clutch and releasing said brake.

References Cited in the file of this patent UNITED STATES PATENTS1,834,993 Atwood Dec. 8, 1931; 2,175,551 Perry Oct. 10, 1939 2,271,049Treckmann et al. Jan. 27, 1942 2,341,474 Orr Feb. 8, 1944 2,664,250Friedman Dec. 29, 1953 2,777,643 Bancroft Ian. 15, 1957 2,946,536Froelich July 26, 1960

2. IN A MACHINE FOR DELIVERING WIRE FROM A COIL THEREOF TO A WIREFORMING MACHINE, A ROTARY TABLE FOR SUPPORTING AND TURNING A COIL OFWIRE TO UNWIND WIRE THEREFROM, A MOTOR, MEANS FOR DRIVING SAID TABLEFROM SAID MOTOR EMBODYING A VARIABLE SPEED PULLEY MOUNTED ON SAID MOTOR,A BELT ENGAGING SAID PULLEY, A CLUTCH DRIVEN BY SAID BELT, A SHAFT ONWHICH SAID CLUTCH IS MOUNTED, AND A DRIVING CONNECTION BETWEEN SAIDSHAFT AND SAID TABLE, A BRAKE DRUM ON SAID SHAFT EMBODIED IN SAIDCLUTCH, A BRAKE ENGAGEABLE WITH SAID DRUM, AND MEANS FOR SIMULTANEOUSLYDISENGAGING SAID CLUTCH AND APPLYING SAID BRAKE TO STOP